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Introduction

Black locust is deciduous weedy tree species in the Pea Family (Fabacaea). It is native to the southeastern United States but has been introduced across the US and parts of Canada where it has been used both ornamentally and in land reclamation (USDA 2010). In BC, it has escaped and naturalized in the southern part of the province in disturbed areas and forest edges. It is a tall (to 25 m), nearly glabrous, deciduous tree that reaches heights of 80 ft. It has dark-brown, deeply furrowed bark and prickly branches with alternate, large, and pinnate leaves that have (7) 11 to 21 leaflets. The white flowers are very fragrant, producing drooping, smooth, shiny pea pods that contain 4 to 8 seeds and remain on the branches in winter. It reproduces from seeds, suckers, and stump sprouts and can form thickets (Global Invasive Species Database 2010). Across its range, it is particularly invasive in "dry and sand prairies and oak savannas" (Global Invasive Species Database 2010).
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